Expansible core for repairing tires.



E. H. TRUMP. BXPANSIBLB com: PQR REPAIRING TIRES.

. 'APPLICATION FILED SEPT.18, 1911.

1,047,594, I v- Pateted Dec.17,1912.

l tire-shoe by means of an air-bag, but as these r UNITED STATES lriiCrEN'r oFFioE.

:Luo n. Tammo? Limon', onilt'o,` estenos or cnn-,iur 'ro Jenn x. wmnrnxs, or A .,Axnomoma mansmnr. conn ron mums Trans.

To all lwhom it may concern.'

Be it known that I, ELNo HENRY TRUMP, a citizen of the United States, residin at Akron, inthe county of Summit and. tate of Ohio, have. invented new land useful Improvements inv Expansible Cores for Repairing' Tires, of which the following is a speciication. This invention relates to devices for ex pending and supporting the inner wall of a tire-shoe, forming part of a double tube pneumatic tire, during the process of repairlng the same. t

The'method heretofore employed consists in sustaining the inner face of the wall of a air-bags, in order to hold air under pressure, are generally made of vulcanized rubber,

they rapidly deteriorate due the heat used inv repairing the tire-shoe, 1n other wqrds, they keep bn vulcanizing while in use and.

become harder and harder until they become Worthless.

The object of this invention isl therefore, broadly speaking, to provide a device which may be used in a tire-shoe for supporting the inner wallthereof and which can be positively expanded at will for stretching and sustaining the portion of the wall which is to be repaired and which during the repairing is usually clamped in a vulcanizing re air-mold.

ore specically the invention embodies a cylindrically-shaped bag of slightly extensible material provided with one or more wedging elements fitting snugly Within the bag and capable of being, longitudinally shifted by means which can be reached through the open part of the tire-shoe. The interior of the bag is substantially filled with a plurality of small movable bodies such as shot, pebbles, sand, and the like, Which-are caused to spreadlaterally under thel longitudinal pressure exerted by the wedging element as it is shifted to cause the bag to expand-and fill the interior of the cavity of the tire-shoe and thereby sustain the wall of the same during the repair thereof.

With the foregoing and other objects in view, the invention consists in the novel construction, combination and arrangement of parts constituting the invention to be hereinafterspecifically describedand illustrated in the accompanying drawings which form a hereof wherein is shown the preferred embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope ofthe claims hereunto appended. ,f In the ydrawings in which similar reference numerals indicate like parts in the dfferlent figures, Figure 1, is a central longitudinal view of an expansible core embody- Fig. 2, 'is a trans-lH ing. this invention; and, verse sectional view of the device shown in Fig. 1 on line X thereof, with the movable bodies omitted.

1`n practice the core is preferably segment-shaped and of alength to. sustain the portion of the tire-shoe which is to be repaired and if desired it may be made longer or shorter to suit the various kinds ofrepairs needed on a tire-shoe.

Referring to the drawings in ydetail the i spcincatxon oftgttenratt f JPatented Dec. 17, 1912. l Application led September 18,1011.' Serial lo. 649,939.

reference numeral 1 indicates an elongated and preferably cylindrical bag of slightly extensible l'material such as canvas vor duck, and of a size to properly iit within a tireshoe. Secured to the inner Wall of the bag 1 by hold-fast devices such 4as rivets 2, and

positioned at the ends thereof are a pair of metallic sleeves 3 which serve to hold the ends of the bag cylindrical and prevent the same from collapsing as well asfurnishing a stiilening medium for the ends of the device.

Slidably mounted in the sleeve 3' at one end of the coreis a conicall wedge 5 comprising a head 6,'slidable along the interior of the collar 3, and havingan elongated tubular stem 7 the outer facefof the inner-end of which is cone-shaped for producing a wedgingaction. Extending centrally through the bagl and into theftuwfbular wedge 5 is a rod- 8 one endof whichl is preferably secured to the head 6 by means.

of a pin 9. The rod 8 preferablyhas a curvature corrteepondixig to'the curve ofthe on Qeopposite end of the bag 2. Moun cured to the outer face of the. wedge 10 is a ianged ring 12 adapted to receive and hold the inner flanged end of a tubular nut 13 provided with a head 14 shaped to receive a wrench and provided with interiorly-arranged threads to engage a threaded poi'-v tion 15 formed at the eIid of the rod 8.

The interior of the bag 1 excepting Where occu ied by the wedges 5 and 10 and the rod 8 is lled with a plurality of movable bodies 16 which may consist of shot, hard steel balls, pebbles, sand, or any other similar materials of such 'a nature asv to be capable of rolling over each other and moving when the tubula Wedges 5 are drawn toward each other y the manipulation of the tubular nut 13, to thereby force them outwardly.` to expand to a slight degree the wall of the bag 1, to cause the same to engage and support the inner face of the wall of a tire-shoe.

In using this core it will be inserted in the opening in the open portion of the' tire-shoe to cover the damaged portion thereof, and the tire-shoe is then laced in a vulcanizing repair-mold, the portions of which are drawn snug' to place thereby clamping the Wall of th; tire-shoe against theexpansible core, after which a suitable tool is applied to the head 14 of the tubular nut 13 and rotated in such a manner as to cause the tubular nuts 5 and 10 to approach each other thereby displacing the imprisoned movable bodiesto cause them toexpand the Wall of the core rml against the inner face of the wall of the tire-shoe. After this the necessary heat is applied until the patch covering the damaged portion of the tire-shoe has been cured. The core is then removed by reversing the direction of rot-ation of the head 14 of the tubular nut 13, to release the pressure on the movable bodies 16 and as the iiange on the inner end of the tubular nut 13 is held against independent movement by the overhanging iange-ring 12 the tubular wedge 10 s drawn outwardly in unison with the nut. This removes the pressure on the bodies, per mitting the ready withdrawal of the core which is then ready for use again.

It will be apparent that the canvas or fabric wall of this core is. not readily burned or capable of being quickly Worn out as are the air-bags now commonly in use, which being of vulcanized rubber are quickly ruined by the operation of repeatedly heating them during the vulcanizing of a repair-patch on a tire-shoe, and at the same time the danger of using metal, which sometimes-burns the tire-shoe, is entirely eliminated.

I claim:

1. A repair core for pneumatic tire-shoes embodying a flexible bag containing a pluof relatively small movable bodies, sleeves y,positioned within said bag, at the ends.` thereof,a back-bone connecting said sleeves Vfor stiffening the device, a threaded rod extendingwlongitudinally of said bag, a-

wedging-element mounted on said rod, means -for shifting the position of said 'wedging element, the latter arranged when shifted in one direction to displace said movable bodies against the Wall of said bag for positively expanding the latter.

2. Arepair core for neumatic tire-shoes embodying a bag of iiexible-material approximately cylindrical in cross-section with open ends and curved in the arc of a circle corresponding to the tire-shoe in which it is to be employed, closure members for the ends of said bag, a rod extending through said bag, mounted on said rod, means for shifting said Wedging-element longitudinally of said bag, andl a mass of small movable bodies positioned Within said bag and around said rod arranged to be laterally displaced by said Wedging-element for expanding the wall of said bag within a tire-shoe.

3. A repair core for pneumatic tires embodying. an open-ended bag, cylindrical in cross-section and curved in the arc of a circle approximatin the curvature of the tireshoe in which it is to be used, guiding-sleeves positioned in the ends of said bag, a mass of small movable bodies contained in said bag, a rod extending through said bag, a closure device for said bag positioned Within the guiding sleeve at one end thereof, a wedgingelement shiftably mounted in said bag at the opposite end of said bag, and means for shifting said wedging-element for laterally .shoe.

4. A repair core for pneumatic tires embodying an open-ended bag of flexible material approximately cylindrical in crosssection and formed in the arc of a circle corresponding to the tire-shoe with which the a wedging-element shiftably` same is to be employed, a mass of small movable bodies within said bag, a rod extending through said bag, a wedging-element shiftably mounted on said rod, means for lshifting said Wedging-element for laterally displacing said movable bodies for ex anding the wall of said bag within a tire-s oe, a sleeve connected with said wedging-element inclosing said bar, and a nut mounted on one end of said rod adapted when rotated to engage said sleeve and shift the position of said wedging-element to laterally displace said movabie bodies for expandingL the wall of said bag.

5. A repair core for pneumatic tire-shoes embodying a tubular member of flexiblematerial having open ends, said member approximately cylindrical in cross-section and 'curved in the are of a eircle approximating the curvature of the tire-shoe 1n which it is to 4be used, guiding sleeves positioned in the ends of said member, a mass of small movable bodies contained in said member, a rod extending through said member, a closure device positioned Within the guiding-sleeve at one end of said member and mounted on said rod, a Wedging-element shiftably mounted on said rod at the opposite end of said member, said Wedging element provided With an inwardly-extending coneshaped portion adapted to laterall vdi lace a relatively large volume of sai. mo able v bodies to expand the wall of said member 15 Within a tire-shoe.

In testimony whereof I have hereunto set my hand in presence of two subscribing Wltnesses.

ELNO H. TRUMP.

Witnesses:

C. E. HUMPHREY, v ANNA L. MCCLINTOCK. 

